Starting a relationship before uni... Watch
Don't! Most relationships don't withstand going to uni. The girls I know who entered relationships did it to lose their V card before freshers. Give it a year and if you feel the same way start the relationship once you've settled in.
Well if you guys have been talking for a while and you feel comfortable and he does too, ask him if he would be willing to be in a long distance relationship before you do anything else. Explain to him your situation and I'm sure he will understand, long distance can be easy if both of you are on the same page about things but if you guys haven't known each for very long you might want to consider getting to know him more before hoping into a relationship. Hope this helps